Motorcycle Cruise Deceleration Control by Lean Angle
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Solution Overview
Problem
Motorcycles in automatic cruise travel mode may experience unstable posture and risk falling over due to deceleration, which is not adequately controlled by existing technologies.
Innovation Solution
A controller and control method that adjust automatic deceleration based on the lean angle of the motorcycle, ensuring that deceleration is synchronized with the motorcycle's posture to prevent falling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic cruise deceleration operation is implemented to assist driver operation, then driver operation assistance is improved, but motorcycle stability deteriorates causing risk of falling over
Solution Approach 1:
The control system dynamically adjusts the deceleration amount based on real-time lean angle detection. When the motorcycle is upright (lean angle within threshold), full automatic cruise deceleration is applied. When the lean angle exceeds the threshold indicating a turn, the deceleration amount is reduced or canceled. This dynamic adaptation resolves the contradiction by making the assistance system responsive to stability conditions.
Solution Approach 2:
The system continuously monitors the lean angle through sensors and uses this feedback to modulate the deceleration command. The feedback loop ensures that automatic cruise control operates safely by detecting when the motorcycle posture indicates turning and adjusting deceleration accordingly, preventing falls while maintaining driver assistance.
2Reliability
If deceleration is applied to maintain distance from preceding vehicle, then collision avoidance is improved, but motorcycle posture stability deteriorates
Solution Approach 1:
The system dynamically modulates deceleration magnitude based on lean angle conditions. During upright travel, aggressive deceleration can be applied for collision avoidance. During turns (detected via lean angle threshold), deceleration is softened or suspended. This dynamic control maintains collision avoidance reliability while adapting to posture stability requirements.
Solution Approach 2:
The control system changes the deceleration parameter (acceleration command) based on the lean angle parameter. When lean angle exceeds the threshold, the deceleration parameter is reduced or set to zero. This parameter adaptation ensures collision avoidance function operates reliably only when motorcycle posture stability is maintained.
3Productivity
If automatic deceleration is increased to improve stopping performance, then braking efficiency is improved, but motorcycle stability deteriorates due to posture changes
Solution Approach 1:
The system applies high deceleration when the motorcycle is upright (within lean angle threshold) to achieve efficient stopping. When the lean angle indicates a turn, the deceleration is reduced or canceled to maintain posture stability. This dynamic adjustment optimizes braking efficiency while preventing falls during turns.
Data Source
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AI summary
The invention obtains a controller and a control method capable of appropriately assisting with an operation by a driver while preventing a motorcycle from falling over. In the controller and the control method according to the invention, in a control mode to make the motorcycle perform an automatic cruise deceleration operation, automatic deceleration that is deceleration of the motorcycle generated by the automatic cruise deceleration operation is controlled in accordance with a lean angle of the motorcycle.